Output a line each time a directory is created.
Output a line each time a directory is created.

This might be helpful in diagnosing the directory creation logic in the
Makefile, which is obscure.

*Might* be related to https://github.com/rprichard/winpty/issues/71

fracting/winpty,rprichard/winpty,fracting/winpty,rprichard/winpty,fracting/winpty,fracting/winpty,rprichard/winpty,rprichard/winpty